Paul Robinson is relishing his Pompey return and claimed: I have nothing to prove.
The former Blues skipper was among the most consistent performers last season after turning his initial loan move from Millwall into a permanent deal in January.
I would like to think there is nothing to provePaul Robinson
But after Andy Awford’s departure, the centre-back was then a surprise casualty of Paul Cook’s overhaul during the summer when he was told he would not be a first-team regular and could find himself another club.
But after signing a two-year deal with AFC Wimbledon, Robinson will be back on familiar territory in Sunday’s televised League Two showdown (2.30pm).
Robinson said: ‘I’m really looking forward to it and playing there again.
‘I would like to think there is nothing to prove.
‘But that doesn’t mean that I won’t be coming down there determined to try to win.
‘When I left, it was a bit of a surprise all round really.
‘But it showed you how quickly football can change.
‘I never envisaged myself leaving in the summer but we know what it’s like in football when the manager changes – nobody’s position is safe.
‘Given the way things had become at Portsmouth, it seemed pretty clear that it was the best option available to me. I wanted to play regularly.
‘But there are no hard feelings on my part.
‘I was obviously disappointed to leave because I really loved my year at Portsmouth.
‘It’s a great club with fantastic fans.
‘I think I left on good terms and hopefully the fans hold me in high regard.’
The 33-year-old’s final act as a Pompey player saw him fracture his cheekbone as he made a goal-line clearance in the 2-0 win over Luton in March, which ruled him out for the rest of the season.
Although he returned to fitness in time for pre-season, the fans’ favourite had slipped down the pecking order and he knew the writing was on the wall.
But Robinson has no regrets over his return to the capital – with the Dons just three points behind Pompey in the League Two standings.
And although he was careful not to give away any secrets, he does not expect his current side to take a defensive approach in the Fratton test.
He said: ‘We haven’t done that in previous away games.
‘We try to win every game – home or away.
‘We know that they have a lot of quality and that crowd really gets behind them.
‘So we know it will be a very, very tough game.
‘But we want to enjoy the atmosphere and the challenge of taking them on.
‘We are only three points behind them but we have been too inconsistent so far.
‘When we do find that consistency, we can start really troubling the top seven and possibly the top three.
‘We have definitely shown we are a capable side.’